diff options
Diffstat (limited to 'src/mame/video/dietgo.c')
-rw-r--r-- | src/mame/video/dietgo.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/mame/video/dietgo.c b/src/mame/video/dietgo.c new file mode 100644 index 00000000000..daf564ba41f --- /dev/null +++ b/src/mame/video/dietgo.c @@ -0,0 +1,93 @@ +#include "driver.h" +#include "deco16ic.h" + +static void draw_sprites(running_machine* machine, mame_bitmap *bitmap,const rectangle *cliprect) +{ + int offs; + + for (offs = 0;offs < 0x400;offs += 4) + { + int x,y,sprite,colour,multi,fx,fy,inc,flash,mult; + + sprite = spriteram16[offs+1]; + if (!sprite) continue; + + y = spriteram16[offs]; + flash=y&0x1000; + if (flash && (cpu_getcurrentframe() & 1)) continue; + + x = spriteram16[offs+2]; + colour = (x >>9) & 0x1f; + + fx = y & 0x2000; + fy = y & 0x4000; + multi = (1 << ((y & 0x0600) >> 9)) - 1; /* 1x, 2x, 4x, 8x height */ + + x = x & 0x01ff; + y = y & 0x01ff; + if (x >= 320) x -= 512; + if (y >= 256) y -= 512; + y = 240 - y; + x = 304 - x; + + if (x>320) continue; + + sprite &= ~multi; + if (fy) + inc = -1; + else + { + sprite += multi; + inc = 1; + } + + if (flip_screen) + { + y=240-y; + x=304-x; + if (fx) fx=0; else fx=1; + if (fy) fy=0; else fy=1; + mult=16; + } + else mult=-16; + + while (multi >= 0) + { + drawgfx(bitmap,machine->gfx[2], + sprite - multi * inc, + colour, + fx,fy, + x,y + mult * multi, + cliprect,TRANSPARENCY_PEN,0); + + multi--; + } + } +} + +static int dietgo_bank_callback(const int bank) +{ + return ((bank>>4)&0x7) * 0x1000; +} + +VIDEO_START(dietgo) +{ + deco16_1_video_init(); + + deco16_set_tilemap_bank_callback(0, dietgo_bank_callback); + deco16_set_tilemap_bank_callback(1, dietgo_bank_callback); +} + +VIDEO_UPDATE(dietgo) +{ + flip_screen_set( deco16_pf12_control[0]&0x80 ); + deco16_pf12_update(deco16_pf1_rowscroll,deco16_pf2_rowscroll); + + fillbitmap(bitmap,machine->pens[256],cliprect); /* not verified */ + + deco16_tilemap_2_draw(bitmap,cliprect,TILEMAP_DRAW_OPAQUE,0); + deco16_tilemap_1_draw(bitmap,cliprect,0,0); + + draw_sprites(machine,bitmap,cliprect); + return 0; +} |